This is theory crafting exercise trying to determine the actual practical use of "Artificial" spell progression many online guides and handbooks suggest as viable. These guides point towards the use of feats such as Heighten Metamagic, Sanctum Spell, Earth Spell and Practiced caster to obtain 9th level spells for classes or PRC's that do not traditionally have 9th level spell slots.
A person in my playgroup is arguing that a prepared spellcaster using these methods can and should be allowed to progress into 7th, 8th, or 9th level prepared spells using these methods as well as it being a "Natural" extension of the rules as a result of a specialized build to futher increase the economy of each spell slot as a result of the build.
I proposed a simple test to see if the rules allow for such a thing using the mechanics he says should work in conjunction to "Extend Spell Progression": Can a Chameleon craft a 9th level scroll of Wish?
If a chameleon can pull this off - then arguably the mechanics could apply to other limited PRC's or spellcasters who "Miss" caster progression in order to take specific level dips.
The Build and process:
Changeling - Chameleon 1st Level Sorcerer, 4th Level Rouge, 10th level Chameleon
Feats - Racial Emulation, Heighten Spell, Sanctum Spell, Earth Spell, Earth Sense, Versatile Caster, Scribe Scroll (7 feats total, 6 from level progression, 1 from Chameleon floating Feat).
Assume this theoretical build has a natural (or boosted) intelligence and charisma score of 20 to manage stat expectations. And because of his chameleon levels he is a 20th level caster.
The Chameleon in question has "Borrowed" a spell book containing wish as a spell.
Using two 6th level spell slots the Chameleon uses Versatile Spell Caster to turn two 6th level slots into a 7th level spell slot.
The Chameleon Prepares Wish using a 6th level slot applying Sanctum Spell and Heighten Spell onto it, causing it to take up a 7th level spell slot.
The Chameleon Casts the Wish spell inside his sanctum with a natural dirt floor - gaining the bonus heighten effect from both sanctum and earth spell - now making it a 9th level spell Slot.
Since the Chameleon can expend a now "Properly" prepared wish spell in the appropriate slot - he can use that spell to craft a wish scroll.
Can someone help articulate how this is broken, or why this is valid?
Or am I otherwise missing the point altogether and it's just a matter of gaining access to casting lower-level spells at higher level to overcome spell resistance and better save DC's?
Previous Questions I've asked related to the subject:
Guides that refrence earth spell as a means to "Fix" casting levels:
*There are one or two more that I'm trying to remember what / where they are in my bookmarks (Mostly from Reddit). I'll post them here once I find them.